Spark-plug.



V. 0. DE YBARRONDO.

l SPARK PLUG.

APPLICATION FILED FEB. 27, 1908.

Patented 0 st. 18, 1910-.

UNITED STATES PATENT our-10E.

vinegar 0. DE YBARnoNno, or LOS ANGELES, onmrormza.

- SPARK-PLUG.

' Specification of Il'etters Patent.

Patented Oct. 18, 1910.

Original application filed May 20, 1907, Serial No. 374,794. Divided and this application filed February 27,

To'a-ZZ whom it concern:

Be it known that I', VmcnNg C. DE Year- 110x00,- a citizen of the United States, res1d- 'ing at Los Angeles, in the county of-Los Angeles and State of California, have invented certain new and useful Im rovements in Spark-Plugs, ofwhich the .fol owing is a specification, reference being bad therein to the accompanying drawing. i

This invention relates to improvements in spark plugs, and has for its object, .the peculiar construction of a plug comprising a. minimum number of parts, which is comparatively inexpensive to manufacture and eiiicient in operation.

This is a divisional application of the original application filed May 20, 1907, Ser. No. 374,794, covering an electrical igniting device for gas stoves. Another object of the invention is the construction of a spark plug, which can be quickly mounted upon asuitable support and be used in connection with agas stove, or a sparking device in connection with a gas engine in a stationary power plant, or upon a motor vehicle.

Vith these and other objects in view, the

invention consists of certain novel constructions, combinations, and arrangements of parts, as will be hereinafter fully described and claimed.

in the drawings: Figure 1 is a perspective view of a spark plug constructed in accordance with the present invention. Fig. 2 is a view in side elevation of a spark plug constructed in accordance with the present invention. Fig. 3 is a longitudinal, sectiona view of the spark plug.

Referring to the drawings by numerals, l designates an insulating member provided with a 'longitudinally-extending aperture or opening, in which is normally positioned the body of a screw 2. T heibody of the insulating member is red ced in diameter, as at 3, and contiguous to the inner end of the reduced portion 3, is a projection 4 formed, preferably, annular shape. Y

The screw or metallic-member 2 (constitiltinga part of the metallic circuitwhen the spark plug is in use) is provided with a grooved or slotted head 5 and a threaded portion (5. Interposed between,the head. 5 and the front end of the insulatingimember 1. is a metallic disk or plate (3. The slotted head 5 is positioned entirelv within the disk Serial No. 418,088.

' 6. Mounted upon the screw 2, near one end,

'or upon the threaded end. 6, is a metallicmember or disk or plate 7, which engages the rear end of the insulating member 1. A thumb-nutflor rotatable locking member 8 is threaded'upon the portion 6 of the screw, and is adapted to clamp a metallic-member, for instance, a piece of wire, betweenitsinnerend and the outer end or faceof the metallic member or disk 7, when it is desired to attach the wire to the spark plug for completing a circuit. The insulating member 1 may be formed of any suitable material, as for instance porcelain, mica, or thelike. l'

I have provided means for mounting the. insulating-member 1 upon asupport, and said mounting means comprises theprojection or enlarged portion 1, together with a primary member 9 and an auxiliary member 10. The primary member 9 comprises, referably, an annular body-portion 11 havmg a primary sleeve 12 and an auxiliary sleeve 13 extending in opposite directions ,therefrom; It will be noted that the sleeves 12 and 13 are integrally connected at their inner ends. The primary portion 12 is pro vided'with an internal screw-threaded surface engaging a similarly-constructed surface ilponthe outer face of, the auxiliary member 10. The auxiliary portion 13 is provided with a screw-threaded outer face or surface 14:. The portion 13 is adapted to be threaded into an aperture in any suitable support; the support being indlcated b dotted lines 15, F 1g..3. Priorto the threa ing of portion 13 into the aperture of a support, it is desirable to place the primary member 9 upon the insulatingmember 1, and cause the body 11 to abut or engage the extension or projection 14,. and then place the auxiliary locking member 10 upon the body portion of the insulating. member, and thread the same into the primary member, for causing the inner end-of the auxiliary locking member to engage one side of the extension or projection 4, whereby the primary' and auxiliary members 9 and 10 are normally secured together, thereby preventing the primary member from bein dis-. placed "or removed oil 'of the insu ating member, whereby, when the portion 13 "is 2 I evaeoa be obvioiisv that I havep'rovided an insulating member or body having means extending therethrough for conducting a current, and mounted u on said body are arts or 5 members of a device for holding t e insulating member upon its support, and said parts or members of the holding-device constitute'interlocking holding-means, or gnenr bers, one overlapping the other; a

My spark plug can be quickly secured upon a support, and owing-to the small number of parts, the same can be easily assembled, nor to the mounting of'the same upon" said support, or'if it is desired, the

member 9 may be first fastened or threaded upon a support and then the insulating or inner member or body- I inserted into the hollow support-engaging member 9, and,

subsequent the auxiliary, annular, inter-- looking member 10 canbe laced upon, the body of the insulating mem er, and thread ed into a portion of the primary memberwhichwas first mounted upon the support When the spark plug is used upon auto- 1nobi1e's or gas engines, and the like, the

- spark-gap will .be between the platinum- -Wire 16 and the metallic end-piece or disk the platinum-wireifi is securely fastened "the primary member 9.'

be noted that the outer face of thehead is flush with the outer face of the disk, thereby preventing any foreign object from coming in contact with the head and injuring the device, besides the head will permit of the tool, as for instance, a screw-driver, to be quickly used when it is desiredto ti hten the wire between the disk 7 and the 0 amp nut 8, thereby making a very eflicient and 40 secure connection at the inner end 'Of thQ device.

What I claim is:

In a spark plug, an insulating sleeve, a renewable terminal comprising a'disk having a countersunk opening ormed therethrough, and arod removably held in said sleeve and terminal and having a head lying wholly within the countersink, the end of said head being flush with that face of the disk which is exposed to the flame of'explosion when the spark !plug is in use, removable means on said rod to secure the :same in the sleeve, and other'means to secure said spark plug to a support.

In testimony whereof I- hereunto afiix my ,signature in presence of two witnesses.

. v'monnr :0. D YBABRQNDO.

By reason of the disk 6' being i with the seat for theilotted hea 5, iii-will 

